Antifriction bearing



Aug. 23,1927. 1,640,207 l J. F; OCONNOR ATIFRICTION BEARING Filed July 9. 1923 CJI Patented fitug. 23, 1927.

ETF@ STATES 1,640,202.l PATENT OFFICE.

JOHN F. OCONNOR, OF CHICAGO, ILLINOIS, AssI'eNoR, BY MESNE ASSIGNMENTS, To W. II. IvIINER, INC., A CORPORATION OF DELAwA'REL ANTIFRICTION BEARING.

Application filed July 9,

viev.'v taken through the ends ot the body and trut-lr bolstersl oi* a. car sli-owing); my improvements .in connection therewith. igure 2 is a top plan view ot the side bearing proper shown in Figure l. And Figure 3 is a vertical 'transverse sectional View corresponding; to the section line 3 3 otl Figure l.

In said drawing, l denotes the upper portion ot a truck bols-ter and ll the under portion ot a corresponding opposed body bolster. The improved bearing` is shown applied to the truck bolster and comprises, broadly, a. base casting. retaining` member or housingy A; an anti-friction element proper-B; and a pairforp counter weights C.

The housing,` A is ot more or less box-like form having a bottom wall l2. curved end walls 13-13, and vertical side walls 14 -14, each ot the latter in turn havinga laterally offs-et section lila tor the purpose hereinafter described. Preferably a hardened wear plate 15 is inserted in the bottom of the housing, the lat-ter beingentered through suitable end openings 16 ot the housing` and sev cured in place by rivets or other rsuitable fastening devices 17. The side walls of the housing `may be provided with Ventilating openings 18, as shown in Figure The anti-friction element B, Vin the instance shown, is of true cylindrical torni adapted to roll back and forth to either side ot central normal position on the bottoni. bearin` platel5. Said roller provided with an axially disposed opening 19 through which is extended a pin 20. the latter being entered through a suitable opening;- 2l in one of the side walls before the plate l5 is applied so that. when the plate l5 is rin position, the pin Q() will be elevated above the openingr 2l and hence the parts maintained in assembled relation, The extreme ends lof 1928. vSerial No. 650,205.

the pin 2() travel back and forth within horizontally elongated recesses 22,-22 provided in the offset sections lila of the housing side Walls. y

. The counterweights C are ot like construction and each isin the form ot an annulus with a relativ-ely large central opening 23 ot preferably slightlymore than twice the diameterwot the pin 20. The disks or oounterweights C are loosely hung uponv the ends of the pin 20,*as clearly shown in Figuresrl and 3'. n the normal position oft the parts, the arrangenientwill be such that the counterweights will just engagey the top side ot' the pin 2O on the interior opening 23 and on their outer peripheries will be in contact with sloping Walls 24-24, which define the ends of the offset sections 14? ot the housing side walls; Said sloping walls 24 are symmetrically arranged with respect to the center line of the bearing and diverge upwardly, ea'ch otI said walls. at its upper end. terminating. in an arcuate section 24a ot a radius corresponding to the lgreater .radius of the annular.counterweights C;

The Operation of the device is as follows, assuming ay movement vof the anti-'friction element toward the right, asviewed in Figure l.. As the element B rolls toward thev right, the pin is carried thereby and moves ina straight horizontal line. Duev to the endsotl the pin 20 having contact with the inner surfaces of the counterweights C, the latter will be shifted bodily lengthwise of the housing and at the same time will be rolled up the corresponding inclined walls 24 until the counterweights reach the dotted line position indicated atL C1 inFigure l. The movement ot the element B lis limited by engagement with the end wall of the housing, and, at the limit of movement it will be noted the counterweights C are in a position of unstabley yequilibrium with the centers Ot weight thereof to the lett ot the center of the pinQO, as viewed in Figure l. Then the load is removed tromjtbe antifriction element B, it is evident that the counterweights C Will not only tend to roll down the inclined walls 24, but will exert an appreciable multiplied leverage action .upon the pin 20 and force the latter posiloo tively toward the Vleft and until the parts tive action on the pin 2O in returning the anti-friction element to central position is, initially, much greater than the mere dead weight of the counterweights C .due to the leverage action above referred to. In this manner, the device is made much more sensitive, although, as the parts reach `central position; the anti-friction element B will be prevented from passing beyond the center and thus will be prevented from vibrating to either side of center because of the counterweights being in their dependent position at that time.

I have herein shown and described what I now consider the preferred manner of arrying out my invention, but the same is merely illustrative and I contemplate all 'changes and modifications that come within the scope ofthe claims appended hereto.

claim:

l. In a side bearing for railway cars; the combination with a housing adapted toV be secured to a bolster, said housing having a bearing surface therein; of an anti-friction roller disposed within said housing and adapted to roll to either side of central position; a pin e1; ending axially through said roller; and a pair of counterweight annuli suspended on the ends of said pin, each of said annuli having an enlarged central opening, the housing having walls symmetrically arranged with respect to the center of the bearing and inclined upwardly therefrom and co-operable with said annuli to elevate the latter as the roller is moved to either side of central position.

2. In a side bearing for railway cars, the combination with a housing having a. lower bearing surface and adapted to be secured to a truck bolster; of a roller disposed within said housing and having an aXially'eXtending pin therethrough; and rings loosely mounted on the ends of said pin, said housing having upwardly diverging walls at each end of the roller eo-operable with said rings to effect elevationthereof to a posi` tion of unstable equilibrium when the roller is moved to either side of central position.

3. In an anti-friction bearing, the combination with a housing adapted to be secured to a bolster or the like, said hon.' n' heilig provided with oppositely inclined ,ii-.rfaces symmetrically arranged with respect to thetransverse center line of the housing and having also a bearing surface associated therewith; of an anti-friction element disposed within said housing for rolling movement on said bearing surface; a counterweight engageable and co-operable with said inclined surfaces, said counter-weight having a relatively large centrally disposed recess; and means carried by and extending axially of said element and within said recess, said means being engageable with the surface of said counter-weight definedl by said recess, said means being` of appreciably smaller sectional area than the area of said recess whereby, upon actuation of the rantifriction element to eith r side of normal position; said counter-weight is bodily elevated by one of said bearing surfaces and simultaneously shifted with respect to said means with a leverage increasing effect thereon. said counter-weight being returned under the influence of gravity and effecting return of Jthe anti-friction element to normal position when said element is relieved of load.

In witness that I claim the foregoing I have hereunto subscribed my name this 6th day of July, 1923.

JOHN F, QCGNNOR. 

